FAT32 DBR Structure

FAT32 DBR Structure

 

Typedef struct _ fat32_dbr <br/>{< br/> byte JMP [3]; // JMP Instruction <br/> byte OEM [8]; // OEM <br/> int16 bytes_per_sector; <br/> int16 sectors_per_cluster; <br/> int16 reserved_sectors; <br/> byte fat_count; // Number of fats <br/> int16 boot_entries; // boot entries (unused) <br/> int16 sectors_small; // sectors (<32 MB, do not use for FAT32) <br/> byte media; // media Descriptor (always is F8) <br/> int16 sectors_p Er_fat_small; // do not use for FAT32 <br/> int16 sectors_per_track; <br/> int16 heads; // number of magnetic heads <br/> int32 sectors_hidden; // 0 ~ DBR <br/> int32 sectors; // sectors (on large volumes) <br/> int32 sectors_per_fat; <br/> int16 flags; <br/> int16 version; <br/> int32 root_dir_1st_cluster; <br/> int16 fsinfo_sector; // number of sectors occupied by DBR <br/> int16 backup_boot_sector; // backup sector <br/> byte reserved [12]; <br/> byte bios_driver; <br/> byte unused; <br/> byte extend_boot_signature; // extended boot flag (0x29) <br/> int32 volume_sn; // volume serial number <br/> byte volume_label [11]; <br/> byte file_system [8]; // FAT32 <br/> byte boot_code [420]; <br/> byte signature [2]; // 55 AA <br/>} fat32_dbr; <br/>